Baader 2" Sleeve with 2" Filter thread - mounts onto 2" female
2" Sleeve with 2" Filter thread (mounts onto any 2" female thread)
Please note this nosepiece has got a 2"=50.8mm male "SC" thread on one end and a 2" nosepiece with a M48 female filter thread on the other end.
This might be a good solution if you have lots of SC-compatible accessories, but then you added a dual speed focuser to your beloved SC telescope and suddenly realised that now you cannot use those accessories anymore as there is no SC thread on the focuser... this nosepiece will screw into your SC threaded accessory and then it can be used in a normal 2" focuser.
The situation will be similar if you added a Baader ClickLock eyepiece holder clamp to your SCT.